Add a [background] to any image

A screenshot straight from your Mac lands as a hard-edged rectangle on a plain white desktop. It carries the information, but it looks unfinished the moment you drop it into a slide, a landing page, or a social post.

The problem is that the image has no edges of its own. It bleeds into the white of the page, so there is nothing to separate the content from the layout around it. There is no depth, no framing, and no sense that anyone chose how it should look. Three small layers fix almost all of it.

• A background gives the image a boundary. Even a quiet gradient tells the eye where the screenshot starts and stops.
• Padding adds margin between the content and that boundary, so the shot is not jammed against the edges.
• A window frame and a soft shadow add context and depth, so a flat capture reads like a real, physical thing sitting on a surface.

This is the exact treatment you see on polished product pages and documentation. It is not a filter or an effect. It is a small amount of framing that signals the image was placed on purpose, and this free tool does all of it in your browser without uploading a thing.

Take your screenshot first. On a Mac, press ⇧⌘4 and drag to grab an area, or ⇧⌘4 then Space to capture a single window with its shadow. The file saves to your Desktop as a PNG. Then bring it here.

1
Upload or drop your image
Click upload, or drag a screenshot straight onto the preview. The image is decoded locally and never sent to a server.
2
Pick a background
Choose a solid, a gradient, or a mesh preset. Darker backdrops make bright app windows pop, while paper and mint keep things calm and neutral.
3
Set padding and corner radius
Slide the padding to give the shot room to breathe, and round the corners so the frame feels soft rather than clinical.
4
Turn on the window frame and shadow
Toggle the macOS window bar to add the three traffic-light dots, then dial the shadow until the image lifts cleanly off the background.
5
Choose an aspect ratio and download
Keep it on auto, or switch to 16:9, square, 4:3, or story to match where it is going. Download exports a sharp PNG at 2x.

This page is perfect for a one-off image. But if you take screenshots every day for docs, support replies, changelogs, or social, framing each one by hand adds up fast. Kapshot is the native Mac app this tool is a taste of. It wraps every screenshot in a beautiful background, a real macOS window frame, and a genuine shadow the instant you capture it, so the finished look is the default rather than an extra step.

Screenshots are only half of it. Kapshot also records your screen, and its recordings follow your cursor with automatic zoom, so the viewer is always looking at the right spot without any editing. It captures system audio and your mic together in one click, which matters because macOS does not record internal audio on its own. The built-in ⇧⌘5 toolbar and QuickTime only record the mic unless you install a virtual audio device. Kapshot handles both natively.

The free tool on this page covers a single image beautifully. Here is how it lines up against reaching for macOS Preview, and against letting Kapshot do it for you on every capture.